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Benefit Plans (Postemployment) (Details) (Postemployment Benefit Plans [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Postemployment Benefit Plans [Member]
Schedule of Defined Benefit Plans Including Postemployment Benefit Plan Disclosures [Line Items]
Weighted-average discount rate used to determine accrued postemployment costs	3.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember	3.70%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember
Estimated net loss expected to be amortized from accumulated other comprehensive losses during 2015	$ 19us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember
Weighted average turnover rate	0.50%mo_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefiTCostWeightedAverageTurnoverRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember	0.50%mo_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefiTCostWeightedAverageTurnoverRate / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember
Rate of compensation increase	4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember	4.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = mo_PostemploymentBenefitPlansMember

X

- Definition

Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Turnover Rate

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:	mo_
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X

- Definition

The interest rate used to adjust for the time value of money.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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X

- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(2)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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X

- Definition

Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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